<template>
    <view class="uni-calendar">
        <view v-if="!insert&&show" class="uni-calendar__mask" :class="{'uni-calendar--mask-show':aniMaskShow}"
              @click="clean"></view>
        <view v-if="insert || show" class="uni-calendar__content"
              :class="{'uni-calendar--fixed':!insert,'uni-calendar--ani-show':aniMaskShow}">
            <view v-if="!insert" class="uni-calendar__header uni-calendar--fixed-top">
                <view class="uni-calendar__header-btn-box" @click="close">
                    <text class="uni-calendar__header-text uni-calendar--fixed-width">{{ cancelText }}</text>
                </view>
                <view class="uni-calendar__header-btn-box" @click="confirm">
                    <text class="uni-calendar__header-text uni-calendar--fixed-width">{{ okText }}</text>
                </view>
            </view>
            <view class="uni-calendar__header">
                <view class="uni-calendar__header-btn-box" @click.stop="pre">
                    <view class="uni-calendar__header-btn uni-calendar--left"></view>
                </view>
                <picker mode="date" :value="date" fields="month" @change="bindDateChange">
                    <text class="uni-calendar__header-text">{{
                            (nowDate.year || '') + ' / ' + (nowDate.month || '')
                        }}
                    </text>
                </picker>
                <view class="uni-calendar__header-btn-box" @click.stop="next">
                    <view class="uni-calendar__header-btn uni-calendar--right"></view>
                </view>
                <text class="uni-calendar__backtoday" @click="backToday">{{ todayText }}</text>
            
            </view>
            <view class="uni-calendar__box">
                <view v-if="showMonth" class="uni-calendar__box-bg">
                    <text class="uni-calendar__box-bg-text">{{ nowDate.month }}</text>
                </view>
                <view class="uni-calendar__weeks">
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ SUNText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ monText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ TUEText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ WEDText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ THUText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ FRIText }}</text>
                    </view>
                    <view class="uni-calendar__weeks-day">
                        <text class="uni-calendar__weeks-day-text">{{ SATText }}</text>
                    </view>
                </view>
                <view class="uni-calendar__weeks" v-for="(item,weekIndex) in weeks" :key="weekIndex">
                    <view class="uni-calendar__weeks-item" v-for="(weeks,weeksIndex) in item" :key="weeksIndex">
                        <calendar-item class="uni-calendar-item--hook" :weeks="weeks" :calendar="calendar"
                                       :selected="selected" :lunar="lunar" @change="choiceDate">
                            <template #day="{day}">
                                <slot :nowDate="nowDate" :year="nowDate.year" :month="nowDate.month" :day="day"></slot>
                            </template>
                        </calendar-item>
                    </view>
                </view>
            </view>
        </view>
    </view>
</template>

<script>
import Calendar from './util.js';
import CalendarItem from './uni-calendar-item.vue'

import {initVueI18n} from '@dcloudio/uni-i18n'
import i18nMessages from './i18n/index.js'

const {t} = initVueI18n(i18nMessages)

/**
 * Calendar 日历
 * @description 日历组件可以查看日期，选择任意范围内的日期，打点操作。常用场景如：酒店日期预订、火车机票选择购买日期、上下班打卡等
 * @tutorial https://ext.dcloud.net.cn/plugin?id=56
 * @property {String} date 自定义当前时间，默认为今天
 * @property {Boolean} lunar 显示农历
 * @property {String} startDate 日期选择范围-开始日期
 * @property {String} endDate 日期选择范围-结束日期
 * @property {Boolean} range 范围选择
 * @property {Boolean} insert = [true|false] 插入模式,默认为false
 *    @value true 弹窗模式
 *    @value false 插入模式
 * @property {Boolean} clearDate = [true|false] 弹窗模式是否清空上次选择内容
 * @property {Array} selected 打点，期待格式[{date: '2019-06-27', info: '签到', data: { custom: '自定义信息', name: '自定义消息头',xxx:xxx... }}]
 * @property {Boolean} showMonth 是否选择月份为背景
 * @event {Function} change 日期改变，`insert :ture` 时生效
 * @event {Function} confirm 确认选择`insert :false` 时生效
 * @event {Function} monthSwitch 切换月份时触发
 * @example <uni-calendar :insert="true":lunar="true" :start-date="'2019-3-2'":end-date="'2019-5-20'"@change="change" />
 */
export default {
    components: {
        CalendarItem
    },
    emits: ['close', 'confirm', 'change', 'monthSwitch'],
    props: {
        date: {
            type: String,
            default: ''
        },
        selected: {
            type: Array,
            default() {
                return []
            }
        },
        lunar: {
            type: Boolean,
            default: false
        },
        startDate: {
            type: String,
            default: ''
        },
        endDate: {
            type: String,
            default: ''
        },
        range: {
            type: Boolean,
            default: false
        },
        insert: {
            type: Boolean,
            default: true
        },
        showMonth: {
            type: Boolean,
            default: true
        },
        clearDate: {
            type: Boolean,
            default: true
        }
    },
    data() {
        return {
            show: false,
            weeks: [],
            calendar: {},
            nowDate: '',
            aniMaskShow: false
        }
    },
    computed: {
        /**
         * for i18n
         */
        
        okText() {
            return t("uni-calender.ok")
        },
        cancelText() {
            return t("uni-calender.cancel")
        },
        todayText() {
            return t("uni-calender.today")
        },
        monText() {
            return t("uni-calender.MON")
        },
        TUEText() {
            return t("uni-calender.TUE")
        },
        WEDText() {
            return t("uni-calender.WED")
        },
        THUText() {
            return t("uni-calender.THU")
        },
        FRIText() {
            return t("uni-calender.FRI")
        },
        SATText() {
            return t("uni-calender.SAT")
        },
        SUNText() {
            return t("uni-calender.SUN")
        },
    },
    watch: {
        date(newVal) {
            // this.cale.setDate(newVal)
            this.init(newVal)
        },
        startDate(val) {
            this.cale.resetSatrtDate(val)
            this.cale.setDate(this.nowDate.fullDate)
            this.weeks = this.cale.weeks
        },
        endDate(val) {
            this.cale.resetEndDate(val)
            this.cale.setDate(this.nowDate.fullDate)
            this.weeks = this.cale.weeks
        },
        selected: {
            handler(newVal) {
                this.cale.setSelectInfo(this.nowDate.fullDate, newVal);
                this.weeks = this.cale.weeks;
            },
            deep: true,
        },
    },
    created() {
        this.cale = new Calendar({
            selected: this.selected,
            startDate: this.startDate,
            endDate: this.endDate,
            range: this.range,
        })
        this.init(this.date)
    },
    methods: {
        // 取消穿透
        clean() {
        },
        bindDateChange(e) {
            const value = e.detail.value + '-1'
            this.setDate(value)
            
            let detail = this.cale.getDate(value)
            this.$emit('monthSwitch', {
                year: detail.year,
                month: Number(detail.month)
            })
        },
        /**
         * 初始化日期显示
         * @param {Object} date
         */
        init(date) {
            this.cale.setDate(date)
            this.weeks = this.cale.weeks
            console.log('this.weeks',this.weeks)
            this.nowDate = this.calendar = this.cale.getInfo(date)
        },
        /**
         * 打开日历弹窗
         */
        open() {
            // 弹窗模式并且清理数据
            if (this.clearDate && !this.insert) {
                this.cale.cleanMultipleStatus()
                // this.cale.setDate(this.date)
                this.init(this.date)
            }
            this.show = true
            this.$nextTick(() => {
                setTimeout(() => {
                    this.aniMaskShow = true
                }, 50)
            })
        },
        /**
         * 关闭日历弹窗
         */
        close() {
            this.aniMaskShow = false
            this.$nextTick(() => {
                setTimeout(() => {
                    this.show = false
                    this.$emit('close')
                }, 300)
            })
        },
        /**
         * 确认按钮
         */
        confirm() {
            this.setEmit('confirm')
            this.close()
        },
        /**
         * 变化触发
         */
        change() {
            if (!this.insert) {
                return
            }
            this.setEmit('change')
        },
        /**
         * 选择月份触发
         */
        monthSwitch() {
            let {
                year,
                month
            } = this.nowDate
            this.$emit('monthSwitch', {
                year,
                month: Number(month)
            })
        },
        /**
         * 派发事件
         * @param {Object} name
         */
        setEmit(name) {
            let {
                year,
                month,
                date,
                fullDate,
                lunar,
                extraInfo
            } = this.calendar
            this.$emit(name, {
                range: this.cale.multipleStatus,
                year,
                month,
                date,
                fulldate: fullDate,
                lunar,
                extraInfo: extraInfo || {}
            })
        },
        /**
         * 选择天触发
         * @param {Object} weeks
         */
        choiceDate(weeks) {
            if (weeks.disable) {
                return
            }
            this.calendar = weeks
            // 设置多选
            this.cale.setMultiple(this.calendar.fullDate)
            this.weeks = this.cale.weeks
            this.change()
        },
        /**
         * 回到今天
         */
        backToday() {
            const nowYearMonth = `${this.nowDate.year}-${this.nowDate.month}`
            const date = this.cale.getDate(new Date())
            const todayYearMonth = `${date.year}-${date.month}`
            
            this.init(date.fullDate)
            
            if (nowYearMonth !== todayYearMonth) {
                this.monthSwitch()
            }
            
            this.change()
        },
        /**
         * 上个月
         */
        pre() {
            const preDate = this.cale.getDate(this.nowDate.fullDate, -1, 'month').fullDate
            this.setDate(preDate)
            this.monthSwitch()
            
        },
        /**
         * 下个月
         */
        next() {
            const nextDate = this.cale.getDate(this.nowDate.fullDate, +1, 'month').fullDate
            this.setDate(nextDate)
            this.monthSwitch()
        },
        /**
         * 设置日期
         * @param {Object} date
         */
        setDate(date) {
            this.cale.setDate(date)
            this.weeks = this.cale.weeks
            this.nowDate = this.cale.getInfo(date)
        }
    }
}
</script>

<style lang="scss" scoped>
$uni-bg-color-mask: rgba($color: #000000, $alpha: 0.4);
$uni-border-color: #EDEDED;
$uni-text-color: #333;
$uni-bg-color-hover: #f1f1f1;
$uni-font-size-base: 14px;
$uni-text-color-placeholder: #808080;
$uni-color-subtitle: #555555;
$uni-text-color-grey: #999;
.uni-calendar {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: column;
}

.uni-calendar__mask {
    position: fixed;
    bottom: 0;
    top: 0;
    left: 0;
    right: 0;
    background-color: $uni-bg-color-mask;
    transition-property: opacity;
    transition-duration: 0.3s;
    opacity: 0;
    /* #ifndef APP-NVUE */
    z-index: 99;
    /* #endif */
}

.uni-calendar--mask-show {
    opacity: 1
}

.uni-calendar--fixed {
    position: fixed;
    /* #ifdef APP-NVUE */
    bottom: 0;
    /* #endif */
    left: 0;
    right: 0;
    transition-property: transform;
    transition-duration: 0.3s;
    transform: translateY(460px);
    /* #ifndef APP-NVUE */
    bottom: calc(var(--window-bottom));
    z-index: 99;
    /* #endif */
}

.uni-calendar--ani-show {
    transform: translateY(0);
}

.uni-calendar__content {
    background-color: #fff;
}

.uni-calendar__header {
    position: relative;
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
    justify-content: center;
    align-items: center;
    height: 50px;
    border-bottom-color: $uni-border-color;
    border-bottom-style: solid;
    border-bottom-width: 1px;
}

.uni-calendar--fixed-top {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
    justify-content: space-between;
    border-top-color: $uni-border-color;
    border-top-style: solid;
    border-top-width: 1px;
}

.uni-calendar--fixed-width {
    width: 50px;
}

.uni-calendar__backtoday {
    position: absolute;
    right: 0;
    top: 25rpx;
    padding: 0 5px;
    padding-left: 10px;
    height: 25px;
    line-height: 25px;
    font-size: 12px;
    border-top-left-radius: 25px;
    border-bottom-left-radius: 25px;
    color: $uni-text-color;
    background-color: $uni-bg-color-hover;
}

.uni-calendar__header-text {
    text-align: center;
    width: 100px;
    font-size: $uni-font-size-base;
    color: $uni-text-color;
}

.uni-calendar__header-btn-box {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
}

.uni-calendar__header-btn {
    width: 10px;
    height: 10px;
    border-left-color: $uni-text-color-placeholder;
    border-left-style: solid;
    border-left-width: 2px;
    border-top-color: $uni-color-subtitle;
    border-top-style: solid;
    border-top-width: 2px;
}

.uni-calendar--left {
    transform: rotate(-45deg);
}

.uni-calendar--right {
    transform: rotate(135deg);
}


.uni-calendar__weeks {
    position: relative;
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
    padding: 0rpx 0 10rpx;
}
.uni-calendar__weeks:not(:first-child){
    border-top: 4rpx solid #F5F5F5;
}

.uni-calendar__weeks:nth-child(2){
    border-top: 0;
}

.uni-calendar__weeks-item {
    flex: 1;
}

.uni-calendar__weeks-day {
    flex: 1;
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 45px;
    border-bottom-color: #F5F5F5;
    border-bottom-style: solid;
    border-bottom-width: 1px;
}

.uni-calendar__weeks-day-text {
    font-size: 14px;
}

.uni-calendar__box {
    position: relative;
}

.uni-calendar__box-bg {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.uni-calendar__box-bg-text {
    font-size: 200px;
    font-weight: bold;
    color: $uni-text-color-grey;
    opacity: 0.1;
    text-align: center;
    /* #ifndef APP-NVUE */
    line-height: 1;
    /* #endif */
}
</style>
